Freescale MC12311 SiP无线连接解决方案

– IIC — One IIC; up to 100 kbps with maximum bus loading; multi-master operation; programmable slave address; interrupt driven byte-by-byte data transfer; supports broadcast mode and 10-bit addressing

– TPMx — One 6-channel (TPM3) and two 3-channel (TPM1 and TPM2); selectable input capture, output compare, or buffered edge- or center-aligned PWM on each channel;

– RTC — (Real-time counter) 8-bit modulus counter with binary or decimal based prescaler; external clock source for precise time base, time-of-day, calendar or task scheduling functions; free running on-chip low power oscillator (1 kHz) for cyclic wake-up without external components; runs in all MCU modes

— KBI — Two 8-bit port keyboard interrupt modules

— Input/Output

– Up to 33 GPIO including dedicated GPIO supporting transceiver

– 13 KBI interrupts with selectable polarity

– Hysteresis and configurable pullup device on all input pins; Configurable slew rate and drive strength on all output pins.

• 1.8 V to 3.6 V operating voltage with on-chip voltage regulators

• Temperature range of –40 ℃ to 85 ℃

• 60-pin LGA (8x8 mm) Package

Freescalewill support theMC12311platform with several software solutions:

• SMAC (Simple Media Access Controller) - This codebase provides simple communication and test apps based on drivers/PHY utilities available as source code. This environment is useful for hardware and RF debug, hardware standards certification, and developing proprietary applications.

• IEEE 802.15.4 MAC with custom PHY layer - TheFreescaleMAC is a robust, mature codebase useful for developing networking solutions.Freescaleis implementing an IEEE 802.15.4 MAC-compatible custom sub-1 GHz PHY template that can be used across different frequency bands. This capability allows users to build powerful networking solutions on a known, stable codebase.

• Wireless MBUS stack - Freescale is porting an existing wireless MBUS codebase to theMC12311platform which will be available through an external partner.

图2.MC12311收发器框图

图3.MC12311 MCU框图

图4.MC12311典型应用电路图

MC12311 开发平台

The MC12311 development platform is a highly-integrated, cost-effective, system-in-package (SIP), sub-1GHz wireless node solution with an FSK, GFSK, MSK, or OOK modulation-capable transceiver and low-power QE32 8-bit microcontroller. The highly integrated RF transceiver operates over a wide frequency range including 315 MHz, 433 MHz, 470 MHz, 868 MHz, 915 MHz, 928 MHz, and 955 MHz in the license-free Industrial, Scientific and Medical (ISM) frequency bands.

The MC12311 development platform is built around the concept of having a single daughter card (12311-MRB) that contains the MC12311 IC and all necessary I/O connections for use as a self-contained module or for connection to an application motherboard like the TWR-RF board.

图5.MC12311 开发平台12311-MRB外形图

Features of the MC12311 development platform include:

• Based on Freescale’s low-cost MC12311 sub-1GHz wireless node solution with an FSK, GFSK, MSK, or OOK modulation-capable transceiver and low-power QE32 8-bit microcontroller, and a functional set of MCU peripherals into a 60-pin LGA package

• Reference design area with small footprint, low cost RF node

— Power Amplifier Output

— Unbalance input/output port

— Flexible RF-Front End for different bands operation

— Programmable output power from -18 dBm to +17 dBm in 1dB steps

— High Sensitivity: down to -120dBm at 1.2kbps

• 32 MHz reference oscillator

• BDM serial MCU debug port

• Optional secondary 32.768 kHz crystal oscillator for accurate low power timing

• Master reset switch

• Full power regulation and management

• 12311-MRB board provides

— Required circuitry for MC12311 - crystals and RF circuitry including SMA connectors for Power Amplifier Output and Input/Output RF port

— Local power supply regulation

— Access to all GPIO

— Standalone or daughter card use modes